TDK-EPC has developed a new series of EPCOS EP5 SMT pulse transformers.
They are used to couple gate-drive circuits to MOSFETs and IGBTs operating at switching frequencies within a range of 150 kHz to several MHz. These transformers are available with a wide range of turns ratios, polarities and outputs.
Thanks to the use of miniaturised EP5 cores, the transformers have dimensions of only 8,1 x 6,7 x 5,4 mm. A special winding technology means that parasitic capacitances between windings are only 25 to 95 pF, depending on the type. Stray inductances are similarly low as they range between 0,9 and 2,5 μH. Short-term dielectric strength is tested to 1500 V d.c. for all types of the B82804A* series. These components are designed for ambient temperatures of up to 85°C and operating temperatures of up to 125°C. Their terminal configuration and pin assignment correspond to the industry standard.
The main applications of these new transformers are half- and full-bridge converters, as well as in frequency converters or inverters.
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